Class StatefulHandler.StatefulMemberParameterResolver

java.lang.Object

io.fluxzero.sdk.tracking.handling.StatefulHandler.StatefulMemberParameterResolver

All Implemented Interfaces:

ParameterResolver<DeserializingMessage>

Enclosing class:

StatefulHandler

protected static class StatefulHandler.StatefulMemberParameterResolver
extends Object
implements ParameterResolver<DeserializingMessage>

Method Summary

Modifier and Type	Method	Description
boolean	matches(Parameter parameter, Annotation methodAnnotation, DeserializingMessage value)	Indicates whether the resolved value is compatible with the declared parameter type.
boolean	mayApply(Executable method, Class<?> targetClass)	Returns true if this resolver might apply to the given method.
Function<DeserializingMessage, Object>	resolve(Parameter parameter, Annotation methodAnnotation)	Resolves a Parameter of a handler method into a value function based on the given message.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ParameterResolver

determinesSpecificity, prepare, specificityPriority, test

Method Details

resolve

public Function<DeserializingMessage, Object> resolve(Parameter parameter,
 Annotation methodAnnotation)

Description copied from interface: ParameterResolver

Resolves a Parameter of a handler method into a value function based on the given message.

If the parameter cannot be resolved by this resolver and ParameterResolver.matches(Parameter, Annotation, M) is not implemented, this method must return null.

Specified by:

resolve in interface ParameterResolver<DeserializingMessage>

Parameters:

parameter - the parameter to resolve

methodAnnotation - the annotation present on the handler method (e.g., @HandleEvent)

Returns:

a function that takes a message and returns a value to be injected into the method parameter, or null if the parameter cannot be resolved and ParameterResolver.matches(Parameter, Annotation, M) is not implemented.

matches

public boolean matches(Parameter parameter,
 Annotation methodAnnotation,
 DeserializingMessage value)

Description copied from interface: ParameterResolver

Indicates whether the resolved value is compatible with the declared parameter type.

This method helps determine whether the parameter can be injected for a given message. It first invokes ParameterResolver.resolve(Parameter, Annotation) and then verifies that the returned value (if any) is assignable to the parameter type.

Specified by:

matches in interface ParameterResolver<DeserializingMessage>

Parameters:

parameter - the parameter being checked

methodAnnotation - the annotation on the handler method

value - the message instance to use for resolution

Returns:

true if the parameter can be resolved and assigned to, false otherwise

mayApply

public boolean mayApply(Executable method,
 Class<?> targetClass)

Description copied from interface: ParameterResolver

Returns true if this resolver might apply to the given method. Implementations should perform only inexpensive checks and never throw.

Specified by:

mayApply in interface ParameterResolver<DeserializingMessage>

Parameters:

method - the handler method or constructor

targetClass - the declaring or target class

Returns:

true if this resolver could apply, false otherwise